Finding the Fourth Proportional to 10,781.96, 16,181.60 and 5,589.32

Step by Step Solution

1. Step 1: Write the proportion equation
   10,781.96 : 16,181.60 = 5,589.32 : x
2. Step 2: Convert to fraction form
   10,781.96/16,181.60 = 5,589.32/x
3. Step 3: Cross multiply
   10,781.96x = 16,181.60 × 5,589.32
4. Step 4: Simplify right side
   10,781.96x = 90,444,140.51
5. Step 5: Solve for x
   x = 90,444,140.51/10,781.96
6. Step 6: Final answer
   x = 8,388.47